Question 310912
Product = -9x^4 . y^5
Factor1= -9xy

Therefore factor2 = Product divided by Factor1
= -9x^4.y^5 / -9xy
=x^3.y^4

Substituting the values i.e, x=1 and y=-2 we have

1^3.(-2)^4
=1.16
=16